EP0034386A2

EP0034386A2 - Apparatus for carrying a person in sitting condition

Info

Publication number: EP0034386A2
Application number: EP81200128A
Authority: EP
Inventors: Johannes Petrus Bakker
Original assignee: BAKKER VIEL ANNA CHRISTINA; Bakker-Viel Anna Christina
Current assignee: BAKKER-VIEL ANNA CHRISTINA
Priority date: 1980-02-14
Filing date: 1981-02-03
Publication date: 1981-08-26
Also published as: EP0034386A3; US4409696A; NL185609B; DK64881A; DE3164797D1; CA1164393A; DK153998C; NL185609C; DK153998B; EP0034386B1; NL8000939A

Abstract

(57) Apparatus for carrying a person in sitting condition, for use on the familiar patient lift "Steel Nurse", known from the Dutch patent 110.348 as well asfromthe U.S.patent 3.694.829.

This patient lift carries lamed or sick people by means of two supporting straps (nrs.18 and 24 of figure 2) moved upwardly by means of the hydraulic piston-cylinder device (nr.5 of figure 1 The lower one of said straps (nr.24 of figure 1) to be guided directly behind the knee hollows below the upper legs of the person to be carried, the upper strap (nr.18 of figure 2) to be guided behind the back of the person, under his arms.

A disadvantage of this system, which has been encountered in practice, is that lamed patients tend to slide out of the upper strap. The invention aims at meeting this disadvantage. To achieve this, the said upper strap (nr. 18 of figure 2) is hooked no longer on the free ends of a fixed horisontal cross bar, but on the free ends of the two revolving rods (nrs.12a and 12b of figure 1). Said rods, revolving in an inclined plane, in the unloaded condition take a mutually spreaded position (by means of a spring) but in the carrying position of the apparatus, under influence of the forces then imparted thereto by the connected strap and patient, are moved towards each other, as figure 2 shows. In this way the strap is tensioned more strongly round the upper body of the patient, whereby the danger of sliding downwardly is opposed. Since said supporting rods (nrs. 12a and 12b of figure 1) yield progressively under the weight of the patient, they tighten said strap in an improved manner around the upper body, as the weight of the carried person is larger. Preferably, the said revolving rods are coupled by gear sectors provided on their pivot axes. In this mannerthere is achieved that the said rods always carry out the same angle rotation, in spite of possible differences in the values of the forces imparted thereto by the body of the patient, so that any tendencies to a slanted suspended position of the body are opposed.

Figure 3 shows a blocking means for special cases in which it may be a disadvantage that the upper strap is tensioned around the body of the patient, for instance when a special painfulness of the breast of the patient makes it impossible to bear the pressure.

Description

The invention relates to an apparatus for carrying a person in sitting condition comprising a carrying lever mounted in cantilever fashion on a frame and a support member suspended from the free end thereof, said support member having an upper transverse portion with a set of engagement points for the extremities of an upper carrying web to be guided behind the back and under the arms of the person to be carried, this transverse portion having at the lower end a set of engagement points for the extremities of a carrying element to be guided directly behind the knee hollows below the upper legs. Such an apparatus is known from the Dutch patent 110.348 as well as from the U.S. patent 3.694.829. In this known apparatus the transverse portion of the support member is constituted by a rod extending to both sides of the central longitudinal plane of the support member, said rod being provided at both its free ends with enlargements behind which fastening eyes provided at the free ends of the upper carrying web may engage.
A disadvantage of this known apparatus which has been encountered in practice is that persons being in a failing physical condition as well as persons having decreased muscle control tend to slide out of the upper carrying web so that finally they remain suspended in an awkward posture on the laterally curved upper arms.
The invention aims at meeting this disadvantage. This aim is achieved according to the invention in that the transverse portion of the support member is constructed such that the relative engagement points take in the unloaded condition a mutually spreaded position but are moved towards each other in the carrying position of the apparatus under the influence of the forces then imparted thereto by the upper carrying web.
In the apparatus according to the invention the engagement points for the carrying web extremities are situated in the unloaded condition spaced as much as in the known apparatus which facilitates the application of the carrying web round the upper body of a person still lying on a bed or sitting in a wheel-chair. However, in the apparatus according to the invention, as soon as the carrying web is loaded when the person to be carried is lifted from the bed or from the wheel chair respectiveiv,itistensioned more strongly round the upper body whereby the danger of sliding downwardly is opposed. The engagement points for the carrying web will thereby yield progressively and therefore tighten the carrying web in an improved manner around the upper body as the weight of the carried person is larger.
In a practical embodiment according to the invention the transverse portion comprises two arms which are pivotable around axes situated in or adjacent to the central longitudinal plane of the support member, said arms being pivotable from a maximum spreaded position against spring pression to a position in which they have a smaller spread angle. Preferably the arms are coupled by gears or gear sectors provided on their pivot axes. In this manner there is achieved that the arms always carry out the same angle rotation in spite of possible differences in the values of the forces imparted thereto so that any tendencies to a slanted suspended position are opposed.
According to a further feature of the invention in which the support member is secured in a manner known per se to the lower end of a vertical shaft which is rotatably journalled in a sleeve provided at the free end of the carrying lever, the pivot axes of the arms are mounted between the flanges of a part which is U-shaped in the cross-section according to the central longitudinal plane of the support member, having its opening directed towards the person to be carried, said part being secured with its upper flange to the vertical shaft.
Particularly the U-shaped part is provided at its ends with brackets closing at that ends the space present between the flanges and constituting limiting abutments for the arms extending obliquely outwardly from the space, said brackets having extensions into two fork legs extending below the obliquely outwardly extending arms, said fork legs supporting at their free ends a shaft around which at least one supporting rod, carrying the lower carrying element and directed obliquely downwardly from the side of the person to be carried, is pivotable in a manner known per se in the direction of a more recumbent posture. By thereby shifting the pivot point for the supporting rod towards the person to be carried the centre of gravity of the carried person in a sitting condition will be situated substantially directly under the pivot point so that the support member adjusts itself automatically into the sitting position under the influence of the weight of the carried person. This represents an advantage relative to the known device according to the above mentioned U.S. patent in which the support member just tends to assume the recumbent position under the influence of the weight of the carried person and in which a locking lever has to be actuated in order to keep the carried person in the sitting condition.
In special cases it may be a disadvantage that the upper carrying web is tensioned around the upper body through the action of the arms as proposed by the invention. In such a case a blocking means is provided according to the invention whereby the arms may be blocked in their maximum spreaded position. Preferably this blocking means is mounted upwardly pivotable from an inoperative position between the fork legs into an operative position between the arms.
The invention is hereunder further explained with reference to the drawing of an embodiment given as an example.

_Fig. 1 shows a perspective view of the apparatus according to the invention, in which only the upper portion of the frame has been indicated by broken lines;
_Fig. 2 is a side view which shows the apparatus in the operative carrying position for the sitting condition and
_Fig. 3 is a plan view of the transverse portion of the support member.

The apparatus as shown in the drawing comprises a base frame 1 which may be of a type known per se, e.g. a type as shown in one of both above mentioned patents and therefore is only partially shown in the drawing. Reference number 2 indicates a column having a carrying lever 3 extending in cantilever manner from that column, said column being permitted to be inserted in known manner vertically into the base frame and may be removed therefrom. The carrying lever proper comprises two parallel arms 3a and 3b which are pivotably connected to the column 2 and are joined at their free ends by a connecting pivot piece 4, the pivot points 4a, 4b of which together with the pivot points 2a and 2b on the column 2 constituting the apexes of a parallelogram. The carrying lever 3 may be moved upwardly and downwardly in the direction of the arrow I by means of a hydraulic piston-cylinder device 5 actuatable through a hand lever 6, the cylinder of the device being mounted pivotably on a part 7 secured to the column 2, the free end 5a of the piston rod being engaged with one of the parallel arms 3a at short distance from the column 2. The connecting pivot piece 4 carries a sleeve 8 which is parallel to the column 2 and as a result of the described parallelogram structure retains a vertical position during the movement upwardly and downwardly of the carrying arm.
The support member 9, to which the invention relates, is journalled in the sleeve 8 with a vertical shaft 10 and is rotatable in the direction of the arrow II.
The support member 9 further comprises a transverse portion 11, secured to the lower end of the shaft 10 and having pivotable arms 12a and 12b as well as three supporting rods 13a, 13b and 13c. The transverse portion 11 comprises a housing 14 which has a U-shaped cross-section, the flanges 14a and 14b of which, as seen in the cross-section, have an oblique or slanting position of e.g. 30° relatively to the horizontal plane. The arms 12a and 12b are each pivotably mounted at one end in the space between the flanges 14a and 14b of the housing 14, namely around shafts 15 (see Fig. 2) which are perpendicular to said flanges and situated at short spacing at both sides of the central longitudinal plane of the housing. The arms 12a and 12b have been coupled by pinions or gear sectors 15a, 15b secured to the relative arm ends, the axes of which coincide with the pivot shafts 15. In Fig. 1 and Fig. 3 the arms 12a and 12b assume their maximum spreaded positions. In this positions the arms 12a and 12b are in engagement with the forwardly directed edges of the brackets 16a.and 16b closing the housing 14 at the transverse ends and therefore constituting limiting abutments for the arms 12a and 12b. One or more springs, not further shown in the drawing but received in the housing, tend to retain'the arms 12a and 12b in the maximum spreaded positions as shown. The free ends of the arms 12a and 12b are shaped as hooks for receiving the eyes 17 provided at the ends of the upper carrying web 18.(see Fig. 2).
The brackets 16a and 16b have extensions below the arms 12a and 12b and extending in the forward direction, i.e. to the side remote from the closed side of the housing 14, into two fork legs 19a and 19b respectively. Reference number 20 indicates a shaft which is rotatably journalled in the free ends of the fork legs 19a and 19b. The centre supporting rod 13a has been secured to the portion of said shaft- extending between both fork legs, a holder 21 being secured to each of the ends of the shaft 20 extending outwardly from the fork legs 19a and 10b, in which holder the upper end has been mounted of a lateral supporting rod 13b and 13c respectively being pivotable around a pivot axis perpendicular with respect to the shaft 20. The three supporting rods 13a, 13b and 13c are contained in a common plane. Thereby both lateral supporting rods 13b and 13c may be pivoted inwardly according to the arrows III from the position as shown in Fig. 1 in which they have been pivoted (e.g. under the influence of a spring not further shown) maximally outwardly around their pivot axes.
The free ends of the fork legs 19a, 19b and the hub portion of the centre supporting rod 13a are provided with cooperating abutment faces 23, limiting the pivotal movement of the supporting rod 13a, 13b and 13c. Fig. 1 shows one of both limit positions, namely the position (substantially) corresponding to the position as taken by the supporting rods in the sitting condition of the person to be carried. From the position according to Fig. 1 the supporting rods may pivot in the direction of the arrows IV towards a position corresponding with a more recumbent posture of the person to be carried.
The supporting rods 13a, 13b and 13c are provided with engagement points for the lower carrying web indicated by the reference number 24. Said engagement points are constituted by pins 25a, 25b and 25c extending in the sitting condition substantially horizontally parallel to the central longitudinal plane of the support member. The outermost pins 25b and 25c are provided with hooks 26 for receiving the eyes 27 provided at the ends of the carrying web 24, The centre pin 25a simply serves as a bearing support for the centre of the carrying web 24. The pins 25a, b, c are secured to slides 28 which are slidable along the relative supporting rods 13a-c and may be fixed by clamping screws in the desired positions.
For lifting a person from a bed or from a wheel-chair one lowers the carrying lever 3, by exhausting the piston cylinder device 5 in a position in which the support member 9 is over the person to be lifted, through such a distance that the eyes 17 at the ends of the carrying web 18, guided around the back and under the arms of the person to be lifted, may be easily hooked onto the hookshaped free ends of the arms 12a and 12b which are in the spreaded position according to Fig. 1. It is therein important that the supporting rods 13a, 13b, 13c may pivot in the direction of the arrow IV to a more recumbent position. Thereafter the lower carrying web 24 is guided directly behind the knees and below the upper legs of the person to be carried and placed on the centre pin 25a and hooked on the outermost pins 25b and 25c. By actuation of the lever 6 the carrying lever is rotated upwardly and the patient is lifted from the bed or from the wheel-chair respectively whereby the arms 12a and 12b move towards each other and the supporting rods 13a-13c pivot towards the sitting position under the influence of the weight of the patient.
When the arms 12a and 12b move towards each other the upper carrying web 18 is solidly tensioned around the upper body of the patient. In some cases the physical condition of the patient may be such that it would be objectionable if the upper carrying web would be tensioned in the described manner around the upper body. Provisions have been made for such a case in order to prevent movement of the arms 12a, 12b towards each other from the spreaded position according to Fig. 1. Said provisions are constituted by a bracket shaped blocking means 29 which is pivotably mounted between the fork legs 19a, 19b and may be pivoted upwardly from an inoperative position between said fork legs towards an operative position. In the operative position the blocking means 29 constitutes an abutment for both arms 12a, 12b whereby they are prevented to pivot towards each other.
Finally it is to be noted that the vertical shaft 10 is received adjustable in the height direction in the sleeve 8. In Fig. 1 the shaft 10 has an upper position relative to the sleeve 8, said position being fixed by a locking pin 31 engaging the upper edge of the sleeve 8 or a bearing ring provided on top of that sleeve respectively and is pushed outwardly from the shaft 10 by spring action. Due to the fact that the locking pin 31 may be pushed inwardly against the spring action the shaft 10 may be lowered relative to the sleeve 8 towards a lower position in which the shaft is supported by a second locking pin 32. This second position of the shaft 10 permits moving the member 9 to a lower level sothat e.g. a person may be lifted from a recumbent posture on a floor.

Claims

1. Apparatus for carrying a person in a sitting condition comprising a carrying lever which is mounted in cantilever fashion on a frame, and a support member suspended from the free end of said lever, said support member having an upper transverse portion with a set of engagement points for the ends of an upper carrying web to be guided behind the back and below the arms of the person to be carried, a set of engagement points being provided at a lower end of the part for the ends of a carrying element to be guided directly behind the knee hollows below the upper legs, characterized in that the transverse portion of the support member is constructed such that the relative engagement points assume in the unloaded condition a mutually spreaded position but in the carrying position of the apparatus are moved towards each other under the influence of the forces which are then imparted thereto by the upper carrying web.

2. Apparatus according to claim 1, characterized in that the transverse portion comprises two arms which are pivotable around shafts situated in or adjacent to the central longitudinal plane of the support member, said arms being pivotable from a maximally spreaded position towards a position including a smaller spreading angle, against spring action.

3. Apparatus according to claim 2, characterized in that the arms are coupled by gears or gear sectors secured to the pivot shafts thereof.

4. Apparatus according to claims 2, 3, characterized in that the pivot shafts of the arms have an oblique position in or parallel to the central longitudinal plane of the support member respectively, namely in such a direction that the pivot plane of the arms substantially coincides with the plane of the upper carrying web when in the operative carrying position.

5. Apparatus according to claims 2, 4 in which the support member is secured to the lower end of a vertical shaft which is rotatably journalled in a sleeve provided at the free end of the carrying lever, characterized in that the pivot shafts of the arms are mounted between the flanges of a part which is U-shaped in the cross-section along the central longitudinal plane of the support member, its opening directed towards the person to be carried, said part being secured to the vertical shafts through its upper flange.

6. Apparatus according to claim 5, characterized in that the U-shaped part is provided at its ends with brackets closing the space between the flanges at said ends and constituting limiting abutments for the arms extending obliquely outwardly from said space.

7. Apparatus according to claim 6, characterized in that the brackets have extensions below the obliquely outwardly extending arms in the shape of two fork legs supporting at their free ends a shaft around which at least one supporting rod, extending obliquely downwardly from the side of the person to be carried and carrying the lower carrying element,is pivotable in a manner known per se in the direction of a more recumbent position.

8. Apparatus according to claim 7, characterized in that the engagement points are adjustable,along the supporting rod..

9. Apparatus according to claims 2-8, characterized by a means movable between an operative and an inoperative position and serving for blocking the arms in their maximally spreaded positions.

10. Apparatus according to claims 8 and 9, characterized in that the blocking means is mounted upwardly pivotable from an inoperative position between the fork legs towards an operative position between the arms.